Plier

ABSTRACT

A plier comprising a pair of crossed arms each of which is provided with two overlying sections composed of a synthetic plastic material. The overlying sections form a recesses in each arm in which a part of the other arm is received and pivotably guided.

United States Patent 1191 1451 Dec. 4, 1973 Krampe [54] puE 1,231,1676/1917 Jones 81/416 1,561,082 10 1925 .lun [76] Inventor: Josef Krampe,Werner Strasse 4, 2,236,941 4/194] Folgy Herbem/Westf Germany 3,161,08512/1964 Pratt 81/415 x [22] Filed: Aug. 20, 1971 App]. No.: 173,608

Foreign Application Priority Data Aug. 22, 1970 Germany P20 41 742.9

US. Cl. 81/415, 81/3.8 Int. Cl. 1125b 7/00 Field of Search 81/415, 416,428,

References Cited UNITED STATES PATENTS 3/1903 Bayrer 81/416 PrimaryExaminer0thell M. Simpson Assistant Examiner-Roscoe V. ParkerAtt0rneyMichae1 S. Striker 57 ABSTRACT A plier comprising a pair ofcrossed arms each of which is provided with two overlying sectionscomposed of a synthetic plastic material. The overlying sections form arecesses in each arm in which a part of I the other arm is received andpivotably guided.

6 Claims, 4 Drawing Figures PATENTEUUEB 4 m3 FIG] INVENTOR mp er kuw aPLIER BACKGROUND OF THE INVENTION The present invention relates topliers and more particularly to a plier with arms composed of asynthetic plastic material.

Pliers are well known. They are available in all shapes and sizes andare used for gripping, clamping,

cutting and similar tasks. Since a considerable amount SUMMARY OF THEINVENTION It is therefore a general object of the present invention toprovide a plier which is not subject to the disadvantages of the priorart.

A moreparticular object of the invention is to provide a plier which isinexpensive and safe to use on electric equipment.

The invention is embodied in a plier comprising a pair of crossed armseach of which is composed of two overlying sections. The arms are eachprovided with a recess wherein a part of one section of each the otherarm is received and pivotably guided. Pivot means are provided forconnecting the arms at their intersection so as to permit relativepivotal movement of the arms.

The two sections which make up each arm are coextensive, one section issubstantially flat and the other section includes a compartmentalizedhollow portion and a jaw portion. The sections are composed of anonme'tallic substance, preferably an injection-molded synthetic plasticmaterial. The sections are of such proportions that when they are joinedto one another they form an arm which exhibits the necessary rigiditythat is required of the arm of a plier. I-Ieretofore this rigidity couldonly be achieved with metallic arms.

The novel features which are considered as characteristic for theinvention are set forth in particular in the appended claims. Theinveniton itself, however,

both as to its construction and operation,-together with additionalobjects and advantages thereof, will be best understood fromthe'following description embodiment when read in connection with theaccompanying drawing.

BRIEF DESCRIPTION OF THE DRAWING FIG. I is a front elevation of a plieraccording to the present invention;

FIG. 2 is a front elevation of two sections of the plier with theoverlying coextensive section omitted for the sake of clarity;

FIG. 3 is a partial view of one arm with the plier; and

FIG. 4 is a partial side view of the arm shown in FIG. 3.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1 there isshown a plier comprising a pair of crossed arms 1 and 2, which arecomposed of insert 9.

two overlying sections 3 and 4 and 3a and 4a, respectively. The sections3 and 3a and 4 and 4a are coextensive, and the arms are identical. Apivot pin 5 connects the four sections 3 and, and 3a and 4a.

In FIG. 2 the upper section 3 of arm 1 has been removed so that itappears as if the arm 1 had been cut in half. To put it another way, ofthe arm 1 only the section 4 is shown, overlying coextensive section 3has been removed; of the arm 2 only the section 4a is shown.

The section 3 and 3a is flat. The section 4 and 4a includes twodepressions 8' which surround the pivot point of the plier and isfurther provided with a compartmentalized hollow portion 6 and a jawportion 7. As may be seen in FIGS. 3 and 4 when the section 3 overliesthe section 4 one of the depressions 8' and the inner surface of section3 form a recess 8. The lower part of section 3 covers the hollow portion6 and its upper part abuts the jaw portion 7. The jaw portion 7 servesas a mutual reinforcement for the coextensive sections 3 and 4 and 3aand 4a in the parts of the arms 1 and 2 which contact the objects whichare to be worked on. In addition, the jaw portion 7 is used to attachaccessory'parts with which the pliers are to be provided. In theembodiment shown the sections 3 and 4 and 3a and 4a are of anon-metallic substance such as synthetic plastic material preferablymade by injection molding.

In the assembled condition the two sections 4 and 4a are located in themiddle of the pliers. The surfaces in which the compartmentalized hollowportions 6 are seen provided are directed toward one another in oppositedirections. A depression 8' of section 4 abuts the identical depression8 of the other section 4a. The section 3 overlies and covers the section4, and the same is true of sections 3a and 4a. Thus the sections 3 and3a are located on the outside of the pliers. The recesses 8' receive andpivotably guide a part of each section 4, 4a of the arms 1 and 2. Therecess 8 of the arm I re.- ceives a part of section 4a of the arm 2 andthe recess 8' of the arm 2 receivesa part of section 4 of the arm1."Thisinterlocking' and mutual guidan'ce'of the two arms provides theplier with a high degree of stability against distortion andmisalignment.

In order to further increase the rigidity of the pliers the holes whichare provided in each section ofthe pliers for the pivot pin 5 may beprovided with a metallic The useful features of this invention areeasily seen. The individual sections 3 and 4 and 3a and 4a may beconveniently and inexpensively made of synthetic plastic material. Thesections are simple to assemble into a plier which exhibits the rigidityheretofore only obtainable in metallic pliers.

Without further analysis, the foregoing will so fully reveal the gist ofthe present invention that others can by applying current knowledgereadily adapt it for various applications without omitting featuresthat, from and range of equivalence of the following claims.

What is claimed as new and desired to be protected by Letters Patent isset forth in the appended 1. A plier, comprising a pair of crossed arms,one of said arms including a first section having two opposite sideseach provided with a recess located opposite a recess on the other side,the other of said arms also including a first section similar to that ofsaid one arm, a part of each of said first sections being received andpivotable in a recess of the respective other first section, said armseach further including a second section coextensive with the respectivefirst section and overlying and being connected to that side of therespective first section which faces away from the respective otherfirst section; and pivot means connecting said parts of said arms forrelative pivotal displacement of the latter.

2. A plier as defined in claim 1, wherein one of said second sections ofeach arm is flat and the first section of the same arm includes twoportions, a compartmentalized hollow portion and a jaw portion.

3. A plier as defined in claim 2, wherein said first sections each havefirst surfaces which are directed toward one another, and secondsurfaces which face outwardly away from one another, and wherein therespective second sections each overlie one of said first surfaces.

4. A plier as defined in claim 1, wherein said pivot means includes ahole provided in each section, and wherein said holes are in registryand accommodate a reinforcement element.

5. A plier as defined in claim 1, wherein said sections areinjection-molded elements composed of nonmetallic material.

6. A plier as defined in claim 5, wherein said nonmetallic material is asynthetic plastic material.

I I l III

1. A plier, comprising a pair of crossed arms, one of said armsincluding a first section having two opposite sides each provided with arecess located opposite a recess on the other side, the other of saidarms also including a first section similar to that of said one arm, apart of each of said first sections being received and pivotable in arecess of the respective other first section, said arms each furtherincluding a second section coextensive with the respective first sectionand overlying and being connected to that side of the respective firstsection which faces away from the respective other first section; andpivot means connecting said parts of said arms for relative pivotaldisplacement of the latter.
 2. A plier as defineD in claim 1, whereinone of said second sections of each arm is flat and the first section ofthe same arm includes two portions, a compartmentalized hollow portionand a jaw portion.
 3. A plier as defined in claim 2, wherein said firstsections each have first surfaces which are directed toward one another,and second surfaces which face outwardly away from one another, andwherein the respective second sections each overlie one of said firstsurfaces.
 4. A plier as defined in claim 1, wherein said pivot meansincludes a hole provided in each section, and wherein said holes are inregistry and accommodate a reinforcement element.
 5. A plier as definedin claim 1, wherein said sections are injection-molded elements composedof non-metallic material.
 6. A plier as defined in claim 5, wherein saidnon-metallic material is a synthetic plastic material.